What is the point where three altitudes of a triangle intersect called?
A 17m ladder is placed against a wall to reach a window 15m above from the ground. What is the horizontal distance of the ladder from the foot of the wall?
What is the measure of third angle, if two angles of a triangle are 52º and 68º respectively?
The difference of the lengths of any two sides of a triangle is always smaller than the length of the